gcc/config/rtems.h

   1 /* Configuration common to all targets running RTEMS.
   2    Copyright (C) 2000-2018 Free Software Foundation, Inc.
   3
   4    This file is part of GCC.
   5
   6    GCC is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published
   8    by the Free Software Foundation; either version 3, or (at your
   9    option) any later version.
  10
  11    GCC is distributed in the hope that it will be useful, but WITHOUT
  12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14    License for more details.
  15
  16    Under Section 7 of GPL version 3, you are granted additional
  17    permissions described in the GCC Runtime Library Exception, version
  18    3.1, as published by the Free Software Foundation.
  19
  20    You should have received a copy of the GNU General Public License and
  21    a copy of the GCC Runtime Library Exception along with this program;
  22    see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23    <http://www.gnu.org/licenses/>.  */
  24
  25 /* The system headers under RTEMS are C++-aware.  */
  26 #undef NO_IMPLICIT_EXTERN_C
  27 #define NO_IMPLICIT_EXTERN_C
  28
  29 /*
  30  * Dummy start/end specification to let linker work as
  31  * needed by autoconf scripts using this compiler.
  32  */
  33 #undef STARTFILE_SPEC
  34 #define STARTFILE_SPEC "crt0.o%s"
  35
  36 #undef ENDFILE_SPEC
  37 #define ENDFILE_SPEC   ""
  38
  39 /*
  40  * Some targets do not set up LIB_SPECS, override it, here.
  41  */
  42 #define STD_LIB_SPEC "%{!shared:%{g*:-lg} %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"
  43
  44 #undef LIB_SPEC
  45 #define LIB_SPEC "%{!qrtems: " STD_LIB_SPEC "} " \
  46 "%{!nostdlib: %{qrtems: --start-group \
  47  -lrtemsbsp -lrtemscpu \
  48  -latomic -lc -lgcc --end-group %{!qnolinkcmds: -T linkcmds%s}}}"
  49
  50 #define TARGET_POSIX_IO
  51
  52 /* Prefer int for int32_t (see stdint-newlib.h).  */
  53 #undef STDINT_LONG32
  54 #define STDINT_LONG32 (INT_TYPE_SIZE != 32 && LONG_TYPE_SIZE == 32)